Easy Librarian Trade

Updated for 1.21.5

To get desired enchantment book trade from librarian,

1. Place a sign at side of lectern
2. Type name and level of enchantment separated by space (eff 5, fortune 3).
3. Right click on lectern to reroll villager trade

Villager will offer trade containing name of book and level written on sign. For example eff 5 -> Efficiency 5, fort 3 -> fortune 3, silk 1 -> silktouch 1